Improved Linux Power Savings For Intel Haswell/Broadwell Laptops In 2023

[reza]

Read the article.

Sorry, these types of replies don't add any value other than increasing noise and comments number. I have read the article and hence I'm in the comments section!

I am curious as to know if this can be back-ported to models earlier than Haswell, if anyone has the experience or knows of similar circumstances this has happened. Thanks!

[M@GOid]

One tip for those with laptops more than 5 years old: If you feel that the screen hinges are stiffer than before, like needing 2 hands to pry open, it is time to either to try to loosen the hinges (in models that allow this, with a 4 to 5 mm spanner or socket), or replace the hinges, BEFORE the chassis around the hinges break due to excessive forces. After the thing breaks, is a lot harder (but not impossible) to put it back together.

[euduvda]

If this patch works it'll be great!
I'm still using my very old laptop that probably will be retired only when it dies. And if I get a better machine (I hope), probably some family member rocking an worse machine (or none) will get an upgrade.

Sadly the replacement batteries are not perfect, but still works for almost an hour! I'm glad if it can be extended!

[stormcrow]

Would this be available on Ivy Bridge laptops like ThinkPad X230 ? It's one generation before Haswell.

Read the article.

[reza]

Would this be available on Ivy Bridge laptops like ThinkPad X230 ? It's one generation before Haswell.

[openminded]

This "feature", combined with screen's high refresh rate, is also known to cause serious stuttering / "tearing" on some Alder Lake laptops, it feels like it's broken by design.

[pWe00Iri3e7Z9lHOX2Qx]

I wonder what debugging I should do to find out why my Haswell laptop doesn't power off sometimes. I mean it attempts but it goes into some state where power is still on, display is off and nothing but four second press on power button has any effect. The same happens with suspend quite often but I don't know if it's related or a different issue.

Do you by chance have multiple packages installed that deal with power management and can conflict with each other? My Strix G15 would crash if I iet go to sleep at a set time, but suspend worked fine if you closed the lid. Turns out Tumbleweed was still installing TLP and Power Profiles Daemon. Removing TLP and only using the latter fixed my issue.

[unwind-protect]

Haswell and Broadwell rock. Good changes.

[johanb]

My primary laptop is a Lenovo X1 Carbon gen 3 with a broadwell CPU, runs like a champ. Looking forward to this change to get into the arch repos soon!

[Tomin]

I wonder what debugging I should do to find out why my Haswell laptop doesn't power off sometimes. I mean it attempts but it goes into some state where power is still on, display is off and nothing but four second press on power button has any effect. The same happens with suspend quite often but I don't know if it's related or a different issue.